What is a typical requirements defect found in the review of user stories?

In the context of user stories, a typical requirements defect that can be identified during a review is a contradiction in acceptance criteria. Acceptance criteria define the conditions under which a user story is considered complete and functional from the end-user's perspective. When these criteria contain contradictions, it can lead to confusion about what the end product should actually deliver. For instance, if one criterion states that a feature can be accessed by all users, but another specifies that it is exclusively for premium subscribers, this creates ambiguity for the development team.

Such contradictions can hinder proper implementation, testing, and overall project alignment, as team members may have differing interpretations of what the user story entails. This highlights the importance of clear and consistent acceptance criteria in user stories, which serves to align expectations and facilitate effective communication among stakeholders.